Biodegradable Polymer Matrix for Controlled Oxidant Release
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Solution Overview
Problem
Conventional in-situ remediation methods for contaminated groundwater and subsurface soils are costly, hazardous, and time-consuming, requiring long periods for significant remediation and posing risks to workers due to the use of chemical oxidants.
Innovation Solution
A controlled release remediation composition comprising chemical oxidant agents encapsulated within environmentally degradable or biodegradable polymers, designed to release oxidants consistently over a period of one to three months, addressing the limitations of conventional methods by providing a safer and more efficient remediation system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional in-situ remediation methods are used, then chemical oxidants can be delivered to remediate contaminated groundwater and soils, but the methods are hazardous to workers and require high maintenance
Solution Approach 1:
The chemical oxidant delivery system is segmented into multiple components: an inner container holding the chemical oxidant, an outer container providing structural support, and a biodegradable polymer matrix controlling release. This segmentation isolates the hazardous chemical oxidant within contained structures, preventing direct worker exposure while enabling controlled remediation through gradual oxidant release into the groundwater and soil environment.
Solution Approach 2:
A biodegradable polymer matrix acts as an intermediary between the chemical oxidant and the contaminated environment. The matrix controls the release rate of the oxidant, mediating the interaction between the hazardous chemical and the groundwater/soil system. This intermediary function reduces worker hazards by eliminating direct handling of concentrated oxidants while maintaining remediation effectiveness through sustained release.
2Reliability
If conventional in-situ remediation methods are used, then contaminated sites can be treated, but the methods require long time periods of many months to years before significant remediation is accomplished
Solution Approach 1:
The delivery system parameters are optimized to control oxidant release kinetics. By adjusting the biodegradable polymer matrix composition, container size, and oxidant concentration, the system achieves a balance between sustained release (maintaining effectiveness) and adequate release rate (reducing overall remediation time). This parameter optimization allows significant remediation to occur within a practical timeframe rather than requiring many months to years.
3Reliability
If chemical oxidants are delivered using conventional methods, then recalcitrant compounds can be remediates, but the methods are costly and require high maintenance
Solution Approach 1:
The biodegradable polymer matrix provides self-service functionality by automatically controlling oxidant release through its degradation process. The system requires no external power, pumping, or active control mechanisms - the polymer naturally degrades in the environment, regulating oxidant release without human intervention. This eliminates maintenance requirements and reduces operational costs while maintaining consistent remediation effectiveness.
Solution Approach 2:
The delivery system is designed as a disposable, single-use unit with no need for complex manufacturing or recovery processes. The biodegradable polymer matrix and container structure are designed to degrade naturally after delivering the oxidant, eliminating costly manufacturing, maintenance, and disposal infrastructure. This approach reduces operational costs by replacing complex, maintainable systems with simple, disposable delivery units.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The controlled release remediation composition effectively remediates chemical pollutants by consistently releasing oxidants over an extended period, reducing the risks associated with conventional methods and enhancing remediation efficiency while minimizing worker hazards and operational costs.
Implementation Method 1
The at least one encapsulant polymer includes at least one of an environmentally degradable polymer, a biodegradable polymer, or a combination thereof
Implementation Method 2
at least one chemical oxidant agent, optionally, at least two chemical oxidant agents... capable of substantially constantly releasing an amount of the at least one chemical oxidant agent
Data Source
AI summary
A controlled release remediation composition or compositions, a method making such composition(s), a method of using such composition(s), and a remediation system including such composition(s) are disclosed. The disclosed controlled release remediation composition or compositions include at least one chemical oxidant agent, optionally, at least two chemical oxidant agents; at least one encapsulant polymer; and, optionally, at least one matrix polymer. The disclosed controlled release remediation composition or compositions are capable of substantially constantly releasing an amount of the at least one chemical oxidant agent, optionally, amounts of the at least two chemical oxidant agents, for example, into an aqueous system such as may be found at a contaminated site, over at least about a one month period up to over about a three month period.